Medium-low rank coal pyrolysis and gasification system and medium-low rank coal pyrolysis and gasification method
A pyrolysis gasification and low-rank coal technology, which is applied in the field of coal chemical industry, can solve the problems of low dust removal efficiency of the first-stage cyclone dust collector, large amount of dust in coal pyrolysis gas, and complex tar treatment process, so as to reduce the burden of dust removal , avoid equipment corrosion, avoid the effects of pipe and equipment blockage
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Embodiment 1
[0041] See figure 1 , middle and low rank coal pyrolysis gasification system, including pyrolysis reactor 5, first cyclone separator 8, first semi-coke bin 10, gasification reactor 15, second cyclone separator 16, second descending bed 17 and the second semi-coke bin 18;
[0042] At the top of the pyrolysis reactor 5, there is an inlet for medium and low rank coal. The medium and low rank coal is used as the raw coal. device 5.
[0043]The pyrolysis reactor wall is provided with a synthesis gas inlet 6, the gas discharge pipe at the upper part of the pyrolysis reactor 5 is connected to the air inlet pipe of the first cyclone separator 8, and the ash discharge port at the bottom of the first cyclone separator 8 is connected to the described In the first semi-coke bin 10, the gas outlet at the top of the first cyclone separator 8 is connected with a first descending bed 9, and the bottom of the first descending bed 9 is also connected with the first semi-coke bin 10 and the bo...
Embodiment 2
[0058] A middle and low rank coal pyrolysis gasification system comprises a pyrolysis reactor, a first cyclone separator, a first semi-coke bin, a gasification reactor, a second cyclone separator and a second semi-coke bin. The medium and low rank coal is used as the raw coal, which is extracted from the raw coal bunker with a bucket, crushed by a crusher, and transported to the pyrolysis reactor through a feeding screw.
[0059] In the system of this embodiment, the pyrolysis reactor is a regenerative rotary furnace (moving bed), and a synthesis gas inlet is arranged on the pyrolysis reactor; a hot semi-coke discharge screw is arranged at the bottom of the pyrolysis reactor. The hot semi-coke discharge screw is connected to the semi-coke inlets on the walls of the first descending bed and the second descending bed.
[0060] Other settings of the system are the same as those in Example 1.
[0061] Using the system of this embodiment, the composition of long-flame coal is trea...
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